@misc{indiciaeca4d455768a7,
  title = {Modification to Tracerlab Automatic Sample Changer},
  author = {F.J. Flanegan and J. M. Nelson and J.J. Warr},
  year = {1950},
  doi = {10.3133/tem142},
  url = {https://pubs.usgs.gov/publication/tem142},
  note = {Source identifier: tem142}
}